Corner mounting and method of making the same



March 6, 1962 G. TSCHENTSCHEL 3,023,678

CORNER MOUNTING ANO METHOD OE MAKING TEE sAME 5 Sheets-Sheet 1 OriginalFiled May 23. 1955 zi/Q. 7.

JNVENTOR. Bgevolol Tgckevi'skel March 6, 1962 G. TSCHENTSCHEL 3,023,678

CORNER MOUNTING AND METHOD OF MAKING THE SAME Original Filed May 23.1955 3 Sheets-Sheet 2 INVENTOR. G-e rolol TS-c, kenfsdae! WM5. gmemMarch 6, 1962 G. TscHENTscHEL 3,023,578

CORNER MOUNTING AND METHOD OF MAKING THE SAME Original Filed May 23.1955 INVENTOR. Gerold Eckerd-sche] Eyman@ g1 @mh United States Patent C3,023,678 CORNER MOUNTING AND METHOD OF MAKING THE SAME GeroldTschentschel, Stuttgart-Sillenbuch, Germany, as-

signor to Firma Heinrich Hermann, Stuttgart-Wangen, Germany Originalapplication May 23, 1955, Ser. No. 510,196. Divided and this applicationDec. 13, 1956, Ser. No. 631,010

Claims priority, application Germany June 2, 1954 4 Claims. (Cl. 93-1)The present invention relates to an adhesive carrying `article and moreparticularly to a corner mounting to be attached by sticky adhesivematerial and into which the corners of va picture or the like areadapted to be inserted and to a method of making the same.

The present application is -a division of the application led May 23,1955, under Serial No. 510,196, now abancloned.

Such corner mountings are used to attach photographs or the like forinstance to pages of albums.

One object of the present invention is to provide a covering for theadhesive material on the corner mounting so that these corner mountingswill not inadvertently stick together.

A further object of the present invention is to provide a covering forthe adhesive material on the corner mounting which can easily bedetached from the adhesive material to uncover the same.

An additional object of the present invention is to provide a method bywhich such corner mountings can be .rade in an efiicient and economicalmanner.

With these objects in view, the present invention mainly consists in acorner mounting having `a first sheet having a front face `and a rearface, a coating of sticky adhesive mateiial fixed to and covering atleast partly one of the faces of the rst sheet, and la second sheet ofnon-fibrous material having a first portion engaging and covering theadhesive coating and a second portion extending beyond the adhesivecoating so that the second sheet can be easily peeled on the adhesivecoating to uncover the same.

T he novel VVfeatures which are considered yas characteristic for theinvention are set forth in particular in the appended claims. Theinvention itself, however, both as to its construction and its method ofoperation, together with additional objects and advantages thereof, willbe best understood from the following description of specificembodiments when read in connection with the accompanying drawings, inwhich:

FIG. 1 shows a front view of a corner mounting according to the presentinvention;

FIG. 2 shows a rear view lof a partially finished cover mountingaccording to the present invention;

FIG. 3 shows a rear view of a corner mounting according to the presentinvention ready to be attached;

FIG. 4 shows a rear view of a corner mounting according to the presentinvention with the adhesive material covered;

FlG. 4a shows a rear view of a modification of a corner mountingaccording to the present invention with the adhesive mater-lai covered;

FiG. 5 shows a longitudinal section through a corner mounting madeaccording to the present invention;

FlGS. 6-8 show longitudinal sections through different modifications ofcorner mountings according to the present invention;

FIG. 9 schematically illustrates a method for making corner mountingsaccording to the present invention;

FIG. 9a schematically illustrates a modified method for making cornermountings according to the present invention; and

Mice

FIG.9b shows another modification of such a method.

Referring now to the `drawings and especially to FIG. 1 which shows acorner mounting of a well known form comprising a base sheet 1 having anupper corner which is covered by a corner cap 2 preferably made fromtransparent material. The front portion of this corner cap is, as can beclearly seen from the sections illustrated in FIGS. 5-8, spaced from thebase sheet and has two flaps 2. which `are bent around the edges of thebase sheet forming the corner Iand which are attached by a layer ofcement 3 or in any other convenient manner to the rear face ofthe basesheet as can be clearly seen from FlG. 2. The rear faces of the twoiiaps and the rear face of the base sheet are covered by a iirst coversheet 4 which is attached to these rear faces by means of adhesive S, ascan be clearly seen from the cross sections of FIGS. 5-8. This firstcover sheet `4 may cover the base sheet 1 completely as shown in thec-ross sections of lFIGS. 5 and 8, or it may stop short of the bottomedge of the base sheet as shown in the cross-sections of FIGS. 6 and 7so that the portion 1 of the base sheet extends beyond of and is beingleft uncovered by said first cover sheet. The rear face of the Erstcover sheet, `that is the face opposite to the face attached to the basesheet, is covered with a coating of sticky adhesive material 6. Thiscoating of sticky ladhesive material may cover the rear face of theFirst-cover sheet 4 completely as shown in the sections of FIGS. 5-7 orit may stop short 'of the bottom edge of this first cover sheet sothat aportion 4 of the same is left uncovered by this adhesive material asshown in FIG. 8. The coating of sticky adhesive material may be madefrom a mixture of polybutenes of different molecular weights forinstance in the following proportions:

2O parts by weight of polybutenes of molecular weight of 20 parts byweight of polybutenes of molecular weight of about 10,000,

10 parts by weight of polybutenes of molecular weight of about 3,000.

O-r the coating may be made from a mixture of polyvinylethers ofdiierent molecular weights with dibutylphthalate for instance in thefollowing proportions:

24 parts by weight of Oppanol C, 16 parts by weight of Lutonal, 2.0parts by weight of dibutylphthalate.

To prevent that the corner mounting, provided on its rear face with 4acoating of sticky adhesive material, inadvertently gets attached to -anundesirable object or that such corner mountings are getting attached toeach other when they are laying in la box, the sticky coating 6 iscovered by a second cover sheet `7 made of non-fibrous material. lnorder to detach this second cover sheet easily from the coating ofsticky adhesive a portion 7' of this second cover sheet extends beyondthe coating. Therefore the second cover sheet can easily be grasped bythe portion 7 and can then be peeled off the coating of the adhesive 6to make it accessible.

Several modifications lare possible to arrange the por? tion 7 of thesecond cover sheet 7 so that this portion can be easily grasped.

FIG. 5 shows a cross section through one modification in which the firstcover sheet 4 extends completely over the base sheet 1 and is on itsrear face completely covered with the sticky adhesive material 6 and inthis case the second cover sheet 7 extends with its portion 7 beyond theunit formed by the base sheet 1, the rst cover sheet 4, and the coatingof sticky adhesive material 6.

in the modification shown in FIGS. 6 and 7, the first cover sheet 4 andthe coating of sticky adhesive material 6 which covers its rear facestops short of the bottom edge of the base sheet 1 so that the secondcover sheet 7 which has in this case the same dimensions as the basesheet 1 extends with a portion 7 beyond the coating 6 as can be clearlyseen from the FIGS. 6 land 7. This portion 7 `can be easily grasped andthe second cover sheet 7 can therefore be easily peeled oil' thecoating. The modification shown in FIG. 7 differs from the one shown inFIG. 6 only in so far `as the rear face of the portion 1' of the basesheet 1 extending beyond the first cover sheet 4 is also covered with acoating of adhesive material 8 so that this lower portion 1 can also besecurely attached When the corner mounting is used.

FIG. 8 shows a further modification in which the base sheet 1, the first`cover sheet 4, yand the second cover sheet 7, have the same dimensions,but wherein the coating of sticky adhesive material 6 stops short of thebottom edge of the iirst cover sheet 4 so that a portion 4 of the sameis left uncovered by the coating 6. Therefore, in this case too, aportion 7 of the second cover sheet 7 remains unattached to the otherparts of the corner mounting and the second rcover sheet 7 can be easilypeeled oli from the coating 6 by grasping the portion 7 Another way offacilitating the peeling otf of the second cover sheet 7 from theremainder of the corner mounting is to .separate said -cover sheet 7 intwo parts by a preferable transversal cut along a line 11 as shown inFIG. 4a. This line has preferably a wavy shape as shown in FIG. 4a, butit may also have a zig-zag shape or be a straight line. AIn this casethe cover sheet is detached by bending the corner mounting along theline of separation 11 so that the adjacent edge portions of the twoparts of the second cover sheet will detach themselves from the adhesivecoating 6 and can be easily grasped to peel two parts oit the coating.

FIG. 9 schematically illustrates a process of making the cornermountings described above. For this purpose a band 4b is provided on oneof its f-aces with a continuous coating 6 in such a way that acontinuous edge portion 4' 'of equal width is left uncovered by thecoating 6. A second band 7b 'of non-brous material and of equal width asthe band 4b is then pressed against the coating 6 on the band 4b in sucha way that the edges of the two bands line up with each other. Thesecond band 7b becomes thereby attached to ythe iirst band 4b except forits edge portion facing the edge portion 4 of the band 4b. The two bandsthus united are then cut along their edge portion opposite the edgeportion 4 along a line forming spaced `corners 7 as shown in FIG. 9. Athird band 1b is also cut along 'one of its edge portions to formcorners 1" of identical outline and equally spaced from each other asthe corners '7". Corner caps 2 are then put over the corners 1" and therear flaps 2f of the corner caps are then respectively attached totheband 1b. The face of the band 1b to which the flaps 2 of the corner caps2 are attached is then cemented or fixed in any other convenient mannerto the face of the band 4b which is not coated, in such a manner thatthe corners 1 line up with the corners 7". Finally the thus formed unitis cut to form corner mountings 9 whereby these corner mountings may beattached to each other at their lateral portions as shown at 10, or theymay Ibe completely separated from each other. In the first oase thecorner mountings are shipped in form of la continuous band from whichthe individual mountings are to-rn otf just before they are used. In thesecond case a completely finished product, ready for use, is fabricated.By the method just described, corner mountings having the cross-sectionas shown in FIG. 8 are made.

As described above, corner mountings according to the present inventioncan be produced in various modilications.

To produce corner mountings, having a cross-section as illustrated inFIG. 5, a method differing slightly from the -above-described method isused. In this case the band 4b is completely covered with a coating ofsticky adhesive as shown in FIG. 9a and the band 7b' which is unitedwith the band 7b exactly in the same way as described above, is widerthan the band 4b so that when the two bands are united with their topedges lining up an edge portion 7' extends beyond the lower edge of theband 4b and remains unattached to the same. Otherwise, the method shownin FIG. 9a proceeds exactly as above described. The top edges of theband are cut to provide space corner 7", the band 1b is cut along itstop edge to provide spaced corners 1" and is afterwards provided withthe corner caps 2 and united by cementing, or in any other convenientmanner to the unit formed of the bands 4b and 7b. The thus formed stripis then cut to the iinal shape of the corner mountings which may beattached at their lateral portions 10 or which may be completelyseparated from each other. The iinished corner mountings 9 are providedwith ilaps 7 which xtend beyond the remainder of the corner mountingsand by which the cover sheet covering the coating of sticky adhesive canbe easily grasped and peeled olf the same.

A third method differing slightly from the just described two methods isschematically illustrated in FIG. 9b. In this case, the band 4b' is madeof smaller -width than the two other bands 7b and 1b. The face of theband 4b' in this case which faces the band 7b is completely covered witha coating of sticky adhesive material 6. The bands 4b and 7b are thenagain united with their top edges lining up and as the band 4b has asmaller width than the band 7b a portion 7' of the band 7b extendsbeyond the bottom edge of the band 4b and remains unattached to thesame. From there on the method shown in FIG. 9b is exactly the same asthe methods just described in connection with FIGS. 9 and 9a. As theband 1b has the same width as the band 7b it is clear that a portion 1of the first band extends also beyond the bottom edge of the band `4band remains unattached to the same, Corner mountings having a crosssection as shown in FIGS. 6 and 7 are produced according to the methodjust described. The portion 1 of the band 1b may be left -uncoated toproduce corner mountings with the cross-section as shown in FIG. 6 orthis portion may be coated with adhesive material preferably before theband 1b is united with the other two bands to provide corner mountingswith the cross section as shown in FIG. 7.

The band 7b may also be provided with a longitudinal cut line to producecorner mountings as illustrated in FIG. 4a which cut line may be of wavyshape as shown in this figure, or may be made along a zigzag or straightline. l

Instead of cementing the two bands 1b and 4b or 4b' to each other, thesetwo bands may also be united by providing a thin thermoplastic layerbetween these two bands or by providing a thermoplastic coating on theface of one of the bands facing the other band and the two bands maythen be heat-sealed to each other,

It is further possible to make the bands 1b and/or 4b themselves fromthermoplastic material and heatseal the same together.

'It will be understood that each of the elements de scribed above, ortwo or more together, may also iind a useful application in other typesof corner mountings and processes of making the same diifering from thetypes described above.

While the invention has been illustrated and described as embodied in acorner mounting to be attached by sticky adhesive material, it is notintended to be limited to the details shown, since various modificationsand structural changes may be made Without departing in any way from thespirit of the present invention.

Without further analysis, the foregoing will so fully reveal the gist ofthe present invention that others can by applying current knowledgereadily adapt it for various applications without omitting featuresthat, from the standpoint of prior art, fairly constitute essentialcharacteristics of the generic or specific aspects of this inventionand, therefore, such adaptations should and are intended to becomprehended within the meaning and range of equivalence of thefollowing claims.

What is claimed as new and desired to be secured by Letters Patent is:

1. A process for making corner mountings into which the corners of apicture or the like are adapted to be inserted, comprising the steps ofapplying a sticky adhesive coating to one face of an elongated firststrip at all parts of said face; placing against said coating a secondelongated strip of non-fibrous material and of a width greater than thewidth of said first strip and in a position where said second stripentirely overlaps said first strip and extends beyond the bottom edgethereof; cutting out parts from said thus-united strips so that saidunited strips have distributed along one common edge a plurality ofmutually spaced, substantially pointed portions; preparing a thirdelongated strip of substantially the same width as said first strip andhaving distributed along one edge a plurality of mutually spaced,substantially pointed portions in the same manner as said first andsecond strips; placing a plurality of corner caps respectively onto thepointed portions of said third strip; fixing said third strip inalignment with said first strip and to the face thereof opposite fromsaid coating so as to assure proper superimposition of said strips andso as to fix said caps between said first and third strips; and cuttingaway portions of the thus-united strips along the edges opposite saidcaps to provide a series of corner mountings of desired configurationwhich are attached to each other at their lateral portions.

2. A process for making corner mountings into which the corners of apicture or the like are adapted to be inserted, comprising the steps ofapplying a sticky adhesive coating to one face of an elongated firststrip at all parts of said face; placing against said coating a secondelongated strip of non-fibrous material and of a width greater than thewidth of said first strip and in a position where said second stripentirely overlaps said first strip and extends beyond the bottom edgethereof; cutting out parts from said thus-united strips so that saidunited strips have distributed along one common edge a plurality ofmutually spaced, substantially pointed portions; preparing a thirdelongated strip of substantially the same width as said first strip andhaving distributed along one edge a plurality of mutually spaced,substantially pointed portions in the same manner as said rst and secondstrips; placing a plurality of corner caps respectively onto the pointedportions of said third strip; fixing said third strip in alignment withsaid first strip and to the face thereof opposite from said coating soas to assure proper superimposition of said stripsand so as to fix saidcaps between said first and third strips; cutting away portions of thethus-united strips along the edges opposite said caps to provide aseries of corner mountings of desired configuration which are attachedto each other at their lateral portions; and then cutting the strips atsaid lateral portions to separate said mountings from each other.

3. A process for making corner mountings into which the corners of apicture or the like are adapted to be inserted, comprising the steps ofapplying a sticky adhesive coating to one face of an elongated firststrip at all parts of said face; placing against said coating a secondelongated strip of non-fibrous material and of a width greater than thewidth of said first strip and in a position where said second stripentirely overlaps said first strip and extends beyond the bottom edgethereof; cutting out parts from said thus-united strips so that saidunited strips have distributed along one common edge a plurality ofmutually spaced, substantially pointed portions; preparing a thirdelongated strip of substantially the same width as said second strip andhaving distributed along one edge a plurality of mutually spaced,substantially pointed portions in the same manner as said first andsecond strips; placing a plurality of corner caps respectively onto thepointed portions of said third strip; fixing said third strip inalignment with said rst strip and to the face thereof opposite from saidcoating so as to assure proper superimposition of said strips and so asto fix said caps between said first and third strips; and cutting awayportions of the thus-united strips along the edges opposite said caps toprovide a series of corner mountings of desired configuration which areattached to each other at their lateral portions.

4. A process for making corner mountings into which the corners of apicture or the like are adapted to be inserted, comprising the steps ofapplying a sticky adhesive coating to one face of an elongated firststrip at all parts of said face; placing against said coating a secondelongated strip of non-fibrous material and of a width greater than thewidth of said first strip and in a position where said second stripentirely overlaps said first strip and extends beyond the bottom edgethereof; cutting out parts from said thus-united strips so that saidunited strips have distributed along one common edge a plurality ofmutually spaced, substantially pointed portions; preparing a thirdelongated strip of substantially the same width as said second strip andhaving distributed along one edge a plurality of mutually spaced,substantially pointed portions in the same manner as said first andsecond strips; placing a plurality of corner caps onto the pointedportions of said third strip, fixing said third strip in alignment withsaid first strip and to the face thereof opposite from said coating soas to assure proper superimposition of said strips and so as to fix saidcaps between said first and third strips; cutting away portions of thethus-united strips along the edges opposite said caps to provide aseries of corner mountings of desired configuration which are attachedto each other at their lateral portions; and then cutting the strips atsaid lateral portions to separate said mountings from each other.

References Cited in the file of this patent UNITED STATES PATENTS2,030,135 Carpenter Feb. 11, 1936 2,622,055 Lieder Dec. 16, 1952 FOREIGNPATENTS 575,353 Great Britain Feb. 11, 1946

